One of the biggest rip-offs in Hi-Fi is cables.
Making your own I/Cs, power cords could'nt be simpler and saves loads of money. It only gets a bit difficult if you use fine gauge wires and that's down to developing the right construction techniques.
I use mil. spec. silver plated copper wire for all my cables. This is so cheap via Ebay from the likes of Navships (totally reliable).
I don't like copper but I have never tried CCC - continuous cast copper.
I've tried silver wire but sonically prefer silver/plated copper.
Important questions are: what gauge wire/s to use / weaving, Litz style or something else, what dialectric and of course plugs, again I prefer silver/plated plugs.
Take a good look at all the various articles available on the net. Have a healthy contempt for all the 'received wisdom' especialy regarding sheilding, which may only have significance if your rig is computer based.
Buying your US mil. spec. wire from Ebay is so cheap and easy. Buy quality plugs which you can use over and over again.
So, you can try all kinds of gauges/solid core/stranded etc until you find the sound that suits you and all for virtually pennies.
Do cables make a difference yes and sometimes big differences, contrary to what some would have you believe and that's the point - believe nothing, except what your own ears tell you